Accession Number : AD0687189

Title :   ANTENNAS INTEGRATED WITH TRANSISTORS AND VARACTOR DIODES.

Descriptive Note : Final scientific rept. 1 May 66-30 Nov 68,

Corporate Author : TECHNISCHE HOCHSCHULE MUNICH (WEST GERMANY) INSTITUT FUER HOCHFREQUENZTECHNIK

Personal Author(s) : Meinke,H. H.

Report Date : 31 DEC 1968

Pagination or Media Count : 137

Abstract : Part 1 deals with transistorized receiving antennas. Definitions of gain, directivity, effective area, noise temperature, noise figure, and sensitivity are given. Active and passive antennas are compared concerning their noise behaviour. The difference between noise match and power match is described. Definitions and measuring methods for bandwidth, selectivity, intermodulation, and crossmodulation in active antennas are given. Part 2 deals with transistorized transmitting antennas. Transistor power gain and power match to the antenna are discussed. Measurements of the radiation of harmonics are described. Part 3 deals with tunable antennas. Examples of antennas tuned with transistors below 30 MHz and tuned with varactor diodes at Frequencies abov 30 MHz are given. Part 4 shows a semidirective antenna with adjustable pattern for vertical and horizontal scanning. (Author)

Descriptors :   (*ANTENNAS, INTEGRATED SYSTEMS), TRANSISTORS, VARACTOR DIODES, GAIN, NOISE(RADIO), IMPEDANCE MATCHING, RADIOFREQUENCY POWER, SENSITIVITY, TUNING DEVICES, DIRECTION FINDING, MODULATION, WEST GERMANY

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE